Nut-lock.



WARREN H. Davon, or PiTTsBURG, PENNsrLvANIA;

NUT-LOCK.

Specification of Letters Patent.

Patented May 21, 1997.

Appiimm med May 23. 1906.' Serin No. 318,402.

T a/Z whom, it may concern:

Be it known that I, WARREN H. Devon, a citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Nut-Locks, of whichthe following is a specification, reference'being had thereinto the accompanying drawing.

locking and jam nuts exert an internal pres.

sure upon the tapering nut, thereby securely locking said nut upon the bolt in connection with which it is used.-

The detail construction oi my improved nut lock will be presently described and then Specifically claimed, and reference will now be had to the drawing forming part oi this specification, wherein z- Figure l is a plan of a bolt, partly broken away, Fig. 2 is a cross sectional view of the same, illustrating the nut or bur as secured therein by the lock nut, Fig. 3 is a perspective view of the nut or bur, Fig. 4 is a cross sectional view of the same, Fig. 5 is a similar view oi the lock nut, and Fig. 6 is a similar view of the jam nut.

" In the accompanying drawings, the reference numeralv l designates a conventional form of bolt having a head 2 and a threaded shank 3. In connection with said holt, I use `a tapering nut 4, extcriorly threaded, as at 5 and interiorly threaded, as at 6. The nut 4 is split as Yat 7 and provided with two flat Vsides 8, 8 forming neck portions 9, 9, one of which is intersected by the splitting of the nut. The iat sides 8 8 provide means for the application of the wrench or other implement employed for gsl'acing the nut upon the bolt, without danger of battering the threads. By this means the nut can be readily placed upon or removed from the l[bolt withoutincreasi xg its thickness over that 'of an ordinary nut, which is a very material advantage in many locations.

. A l-xcking nut 1() anda jam nut 11 are employe-z' to lock the nut 4 uponv the bolt 1. The locking nut 10 is first placed upon the nut 4, and. as said nut is rotated upon the nut 4, said nut is compressed, therebyl exerting an internal pressure, which binds the interior threads of the nut 4 upon the threads of the bolt shank 3l 'Ihe'jam nut 11 is then placed upon the nut 4, to retain the lock nut 10 i upon the rear half of the nut 4.

Fre/m the foregoing, it will be observed that the threads of the nuts 1() and 1l conform intaper to the taperin threads of the nut 4, thus insuring an equa distribution of pressure upon the nut 4, that tends to firmly bind said nut upon the end of a bolt. v

What I claim and desire to secure by Letters Patent, is

In a nut lock, the combination with a threaded bolt, of a taperin inner nut thread: ed externally and internalIy from end to end and adapted to engage the threads. of the bolt and with oppositely locatedl ilat faces, said inner. nut split on one side throughout its. length, the split extent ing from one flat face thereoi1 into the central threaded opening, and two outerinuts whose combined thickness corresponds to the thickness of the inner nut and botlrouter nutsmounted upon the tapering inner nut and with threaded bores engaging the tapering inner nut.

In testimony whereof I aiiX my signature in the presence of two witnesses.

IVARREN H. DEVOE. Vitnesses:

K.- H. BTLER, MAX H. SRoLovrrz. 

